I build a voltage regulator as shown in the photo with a variable regulator LM317. I used the school campus computer to build and simulate this circuit and didn't have any problems. When I got home I used my home PC to add R3 to regulate the current to 100 mA and R4 for the load, which is actually two high power LED's in series. As you can see in the photo, R3 and R4 are both underlined. Why is that? Also, I couldn't find an LM317 with a Pspice model attached to it on my home PC. I'm guessing that I don't have my software set up right.
That's my first question. The second question is the output of this circuit. When I built the circuit on a breadboard, I got an output of 14.2 V and 90-96 mA across the LED's. The LED's are 6.1 V 100 mA high power LED's from Phillips Lumileds. You can see in the photo that the current output as simulated on my home PC was nowhere near what I actually got.
Thanks a lot,
Mike
That's my first question. The second question is the output of this circuit. When I built the circuit on a breadboard, I got an output of 14.2 V and 90-96 mA across the LED's. The LED's are 6.1 V 100 mA high power LED's from Phillips Lumileds. You can see in the photo that the current output as simulated on my home PC was nowhere near what I actually got.
Thanks a lot,
Mike
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